Preparation of adhesive surfaces



.I. A. NOBLE.

PREPARATMON 0F ADHES'IVE SURFACES.

APPLICATION FILED JULY 19,1920.

1,361,894. Patented Dec. 14, 1920 INVENTZ.

BY A

ATTORNEY UNITED STATES JAMES A. NOBLE, OF ROCHESTER, NEW YORK.

PREPARATION OF ADHESIVE SURFACES.

Specification of Letters Patent.

Patented Dec. 14, 1920.

Application filed July 19, 1920. Serial No. 397,328.

1 0 all whom it may concern.

Be it known that I, .lmrns A. NOBLE, of

ochester, in the county of Monroe and State of New York, have invented certain new and useful Improvements in the Preparation of Adhesive Surfaces; and I do hereby declare the following to be a full, clear, and exact description of the same, reference being had to the accompanying drawings, forming a part of this specification, and to the reference numerals marked thereon.

ll/iy improvements are particularly applicable to prepared fabrics that are often made as a substitute for or imitation of leather and consist of a woven body portion havin a dried coating on one side to provide the smooth, flexible and waterproof or other finished surface and the tacky surface on the other side consisting of a coating of a more or less permanently sticky adhesive, through the medium of which the fabric is applied to objects that it is desired to trim, or cover over. Cheap material of this kind is ordinarily -diilicult to handle because of the tacky substance adhering so readily when doubled upon itself or placed in conadjacent sheets, and it is the ob- 3 invention to render this tacky emporarily non-adhesive so that the mav be handled with greater rapidity it is the further object of my invention, however, not to thereby impair the ulti value of the tacky surface as an adhesive. To these and other ends the invention resides in certain improvements and combinations of parts, all as will be here more fully described, the novel features being pointed out the claims the end of the specification.

In the drawings:

Figure l. is a plan view of a sheet of material constructed in accordance with and illustrating one embodiment of my invention Fig. of, and

Fig. 3 is a similar sectional view the addition to the surface of a coating of cement in the final use thereof.

Similar reference numerals throughout the several views indicate the same parts.

Material of the nature I have mentioned consisting of a fabric body, an outer finished coating and an inner tacky coating is largely 2 is an enlarged sectional view thereshowing manufachave shown in this purp formed and stiffened with paper proper points, the finishing covering is applied to the rough surface of fabric and paper by adding a coating of ordinary rubber cement to the tacky surface and pressing it thereon. Ihave discovered that by initially powdering the tacky surface with certain materials in a finely comminuted dry or solid state, such surface is rendered temporarily non-adhesive and the sheets may be piled one upon the other and carelessly handled without adhering to each other or to other objects, and yet when the cement is applied the film of powder is eradicated as such and in no way interferes with the adhesiveness which is immediately rest-c d if not increased.

The substances l have used with success, as the powdering' medium, are themselves adhesives. and consist of gelatinous o mal glue, vegetable glue. including brodown starch or dextrin compounds, and commercial glue known as Moran the composition of which is not but which I understand to be by-pr d ct from the waste suhite liquors produced in paper manufacture. It is a product readily admits 0 tion. These substances, in powc are simply dusted upon the surface until its adhesiveness has disappeared.

When is desired to convert the surface bacl: its tacky consistency a film of ber cement is spread thereon the customary way, and Z find that it has the property of either taking the glue into solution, or at least forming therewith a col loidal solution, such action being equivalent so far as the desired results are concerned to an ordinary solution. The ine mixes in the fluid cement in particles of colloidal size, thus eliminating the resistant effect to adhesion. The rubber cement may be the usual Para rubber dissolved in carbon bisulfid and benzin or naphtha (includvolatile solvent.

e substances enumerated I have obgenerally a blank My invention is of great utility not only in packing, storing and shipping adhesive sheets and the'like, but in handling the same in processes of manufzurturc. For instance, in the manufacture of camera bellows as outlined, the tacky covering must be trimmed in various ways at different stages in the formation of the bellows, and the temporarily inert or powdered and non-adhesive surface is much more readily acted upon in this way than one that is sticky and quick to adhere to any surface with which it is brought in contact.

In the accompanying drawing 1 indicates of flexible imitation leather cloth cut to a form for application to a camera bellows. The body of the cloth in the sectional views is indicated at Z, the outer finished coating at 3, and the tacky or adhesive coating at 4. Powdered on the latter are the particles of glue shown at 6 in Fig. 2. In Fig. 3 these particles are shown to have disappeared in the film of rubber cement 5 that has been applied to the tacky coating 4.

I claim as my invention:

1. The method of rendering a tacky surface temporarily non-adhesive which consists in powdering such surface with an adhesive in solid for 2. The method of rendering a tacky surface temporarily non-adhesive which consists in powdering such surface with another adhesive in solid form and insoluble in the tacky substance.

The method of rendering a tacky surface temporarily non-adhesive which consists in powdering such surface with an adhesive in solid form, and then applying to the surface, preparatory to its use, a cement 7 which is a solvent for the powdered adhesive.

l. The method of rendering a tacky surface temporarily non-adhesive which consists in po'wdering such surface with a glue insoluble in the tacky substance.

The method of rendering a tacky surface temporarily nonadhesive which consists in powdering such surface with Motan glue.

6. The method of rendering a tacky surface temporarily non-adhesive which consists in powdcring such surface with Motan glue, and then applying to the said surface, preparatory to its use, a rubber cement.

7. The method of rendering a tacky surface temporarily non-adhesive which consists in powdering such surface with another adhesive in solid form and insoluble in the tacky substance, and then applying to the surface, preparatory to its use, a cement which is a solvent for the powdered adhesive and which combines adhesively with the tacky substance.

8. As an article of manufacture, a flexible sheet adapted to be joined to another object by adhesion and provided with a. tacky coating, the surface of the latter being covered with. a powdered adhesive.

9. As an article of manufacture, a flexible sheet adapted to be joined to another object by adhesion and provided with a tacky coating, the surface of the.latter being powdered with a glue insoluble in the tacky substance.

10. As an article of manufacture,- a flexible sheet adapted to be joined to another object by adhesion and provided with a tacky coating, the surface of the latter being powdered wlth Motan lue.

JAMES A. NOBLE. 

